<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            display: flex;
            width: 60%;
            height: 300px;
            background-color: pink;
            margin: 0 auto;
            flex-wrap: wrap;
        } 
        div span{
            width: 160px;
            height: 100px;
            line-height: 100px;
            background-color: DodgerBlue;
            text-align: center;
            font-size: 30px;
            color: #fff;
            margin: 10px;
        }
    </style>
</head>

<body>
    <div>
        <span>1</span>
        <span>2</span>
        <span>3</span>
        <span>4</span>
        <span>5</span>
        <span>6</span>
        <span>7</span>
        <span>8</span>
        <span>9</span>
        <span>10</span>
    </div>
</body>

</html>